Three-dimensional reconstruction method and device based on phase-shifted gray code hybrid encoding
By employing a phase-shift Gray code hybrid encoding method, utilizing a binocular infrared camera and a MEMS galvanometer structured light projector, and combining Gray code decoding with a phase-shift sine fringe pattern, the problems of insufficient accuracy and slow response speed in 3D reconstruction were solved, achieving high-precision and robust 3D reconstruction.
CN122454039APending Publication Date: 2026-07-24BEIJING INST OF TECH
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Patent Information
- Application Number
- CN202610545446.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
Existing 3D reconstruction methods lack accuracy in complex surgical environments, are sensitive to ambient light, and have limited response speed, making it difficult to meet the requirements of high precision and real-time performance.
Method used
A phase-shift Gray code hybrid encoding method is adopted. Structured light pattern sequences are acquired by a binocular infrared camera. Combined with Gray code decoding and phase-shifted sinusoidal fringe patterns, thresholding segmentation, phase unwrapping, and parallax optimization are performed to reconstruct a high-precision 3D point cloud.
Benefits of technology
It achieves high-precision and robust 3D reconstruction in complex surgical scenarios, improves response speed, and provides reliable 3D spatial input.
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Smart Images
Figure CN122454039A_ABST
Abstract
The application discloses a three-dimensional reconstruction method and device based on phase shift Gray code hybrid coding, relates to the technical field of structure light three-dimensional reconstruction, and solves the problems of insufficient three-dimensional reconstruction precision, weak robustness and slow response speed in a complex operation scene. The method provides a complete reconstruction chain, guarantees the reconstruction precision and robustness by combining high-frequency phase with Gray code auxiliary phase shift, and guarantees the accuracy of high-frequency phase unwrapping without adding too many patterns by combining low-bit inverse code and jump detection, so that high-precision three-dimensional reconstruction is realized.
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